The Barnacle Orphnoch is an Orphnoch in the employ of the company Smart Brain and a minor, but important antagonist in Kamen Rider 555.


He at some point set the fires that killed Mari's parents and later Teruo's. However, when his actions attracted attention from law enforcement he was fired for his incompetence by Kyoji Murakami and marked for death, with Kyoji sending Kitazaki to kill him. Barnacle was unaware of this and continued to attempt to retrieve the Rider Gear until he was killed by Faiz (Yuji Kiba)'s Grand Impact.